E227 – Calcium Hydrogen Sulphite

Description

White crystalline powder

Risks

Notes

Calcium hydrogen sulfite is a white crystalline powder made by combining calcium with sulfur dioxide and water. This process creates what's called a sulfite compound – essentially a salt that contains sulfur. It's produced industrially by treating calcium hydroxide (lime) or calcium carbonate with sulfur dioxide gas, creating crystals that can be easily added to food and beverages during processing. This additive serves multiple functions in food production, primarily as a preservative and antioxidant. It prevents the growth of bacteria and molds while also stopping fruits and vegetables from browning when exposed to air. You'll commonly find calcium hydrogen sulfite in dried fruits, fruit juices, wine, pickled vegetables, and some processed potato products. It's particularly useful in the wine industry, where it helps preserve flavor and prevent spoilage during fermentation and storage. While generally considered safe for most people, sulfites like calcium hydrogen sulfite come with an important health consideration: some individuals, particularly those with asthma, can be sensitive or allergic to sulfite compounds. This is why foods containing sulfites must be clearly labeled in many countries. The additive is suitable for vegetarian and vegan diets, and since it's mineral-based, it's generally acceptable under most religious dietary laws. If you're sulfite-sensitive, you'll want to check labels carefully and avoid products containing this preservative.